Where does “Kȳrie eleison” come from?

Kȳrie eleison (Ecclesiastical Latin) comes from Ancient Greek Κῡ́ριε ἐλέησον.

Ancestry of “Kȳrie eleison”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Κῡ́ριε ἐλέησον	—

Kȳrie eleison — Etymology, Origin & Word History | Etymology Explorer